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5 Sheets Sheet 1.

(No Model.)

' W. W. REYNOLDS.

PLATFORM SGALE gaven/1:07",

(No Mocjlel.)V

. 5 Shets-Sheet 2. W. W. REYNOLDS.

PLATFORM SCALE.

Patented Apr. 8, 1884.

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(No Model.)

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W. WREYNOLDS. PLATFORM SCALE.,

Patented Apr. 8, 1884.

5 Sheets-Sheet 3.

(No Model.) I 5 Sheets-Sheet 4.

' W. W. REYNOLDS.

PLATFORM SCALE.

No. 296,451. Patented Apr. 8, 1884.

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Wmjyljfey7wu@ '7 -L a (No Model.) 5 Sheets-Sheet 5.

W. W. REYNOLDS.

- PLATFORM SGALB. No. 296,451. PatentedApr. 8, 1884.

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lhvrTnn STATES ATENT rtree.

Y SCALE COMPANY,

OF SAME PLACE.

PLATFORM-SCALE.

SPECIFICATION forming part of Letters Eatent No. 296,451, dated April 8,1884.

Application filed August 10, 1883.

To all whom it may concern:

Be it known that I, W'ILLIAM WV. REY- NOLDs, a citizen of the UnitedStates, residing in the city of Rutland, county of Rutland, and State ofVermont, have invented certain new and useful Improvements inPlatform-Scales, fully described and represented in the followingspecification and the accompanying drawings, forming a part of the same.

This invention relates, generally,to that class of platform scales whichare supported on suitable foundations,depressed below the surface of theground, and in which the platform upon which the load to be weighed isplaced is on a level with the surrounding surface, but more particularlyto those scales which are designed for weighing railway-cars and theircontents, and in which the platform of the scale carries the rails ofthe track over which the car passes. In scales of this class it' is ofcourse necessary that the platform should be of a length at least equalto that of an ordinary railway-car, and to obtain this comparativelylarge dimension it has been found necessary, in the constructionsheretofore employed, to make the levers upon which the platform restscorrespondingly long. rlhis in practice has been found veryobjectionable, as by reason of their great length these levers areliable to spring and become so distorted as to throw their knife-edgesout of level, and thus destroy the accuracy of the scale.

It is the object of the present invention, among other things, toovercome this difficulty, and to provide a scale which will be strongand simple in construction, and which can be constantly maintained inaccurate working condition.

To this end the invention consists in a system of levers and connectionsso arranged that the length of the /individual levers may readily bereduced within limits which will overcome the tendency to spring and getout of level, while at the same time the system may be extendedindefinitely, so as to support a platform of any desired length.

rlhe invention also embraces various details of constructionandfcombinations of parts byv which this result is effected, all ofwhich will be hereinafter fully explained, and particularly pointed outin the claims.

(No model.)

In the accompanying drawings, Figures l and 1* are a longitudinalelevation of a scale embodying the invention, portions of the platform,supporting-beams, and foundation being 5 5 broken away, and other partsbeing shown in section to more fully exposethe operative parts. Figs. 2and 2* are a plan view of the same, a portion of the platform beingremoved. Fig.

3 is a cross-section taken upon the line y y of 6o Fig. 2, and Fig. 4 isa like view taken upon the line x x of the-same dgure Referring to saiddrawings, it is to be understood that the platform, composed of theplanks 20, is supported upon two beams, 21,

extending longitudinallyT of the scale, and supported, as is usual, uponthe cross-heads 33 of a series of mounting-levers, 22, 23, 24, 25, and26. The cross-heads 33 are provided at their opposite ends with theusual knife- 7o edge pivots, 5, which rest upon supports 6, rising fromlongitudinal beams 3l, resting upon the foundation A, which surroundsthe scale, and the beams 21 and cross-heads 33 are provided with theusual interposed ball- 7 5 and-socket bearings, 2 3, which rest uponknife-edge pivots 4 in the ends of the crossheads, all as clearly shownin Figs. 1 and 1*. The mounting-levers are fulcrumed at suitabledistances from each other, and are pref- 22 is connected to one end ofan extension-le- 8 5 ver, 34, by means of a shackle, 35, which -isprovided with suitable shoes, upon which bear the knife-edge pivots inthe ends of both the levers. The lever 34 is pivoted centrally, or

nearly so, on a vertical standard, 36, which is bolted to a support, 37,which rises from the foundation of the scale, and is so formed as tobridge the space occupiedby the levers 23 24. The opposite end of thelever 34 is connected through its knife-edgeand a shackle, 40, to one ofthe knife-edge pivots 9 in the bifurcated end of a cross-lever, 41,which is connected through a rod, 13, in the usual manner, with theweighing-beam of the scale. The mounting-lever 26 is connected, throughits knife- 100 edge pivot and a shackle, 39, to a similar pivot in 011eend of an extension-lever, 33, which is pivoted on a standard, 42,bolted to asupport, 43, which rises from the foundation of the scale,and is so formed as to bridge the space occupied by the lever 25. Theopposite end of the lever 3S is connected by a shackle, 45, with one endof a second extension-lever, 44, the opposite end of which is connectedby a shackle, 46, (see Figs. 2 and 3,) with one end of a thirdextension-lever, 48, the opposite end of which is connected by ashackle, 51, with the other knife-edge pivot 9 in the end ofthecross-lever 41. The support 47, in which the lever 44 is pivoted, isprovided with shoes 60, against which the knife-edge pivots of the leverrest, and with nuts 61, by which the shoes 60 can be raised or loweredto bring the lever to the proper height to level the several levers withwhich it is connected. rIhe lever 25, which is located in line with the2o vlever 26 and passes under the support 43 and the extension-lever 44,is connected at its free end, by a link, 1, yoke 7, and double shackle8, to the triple-pivot end of the lever 48, by which connection thepivot in the end of the lever 25 can underlie that in the end ol thelever 44 and the two be connected to the lever 48 at the same point.rIhe lever 48, like the lever 34, is pivotcd upon a standard,4),whieh.is bolted to a support, 62, which, like the support 37, rises fromthei'oundation ol' the scale, and is so formed as to bridge the spaceoccupied by the levers 24. The form ofthe standard 49 and .support 62 isclearly shown in Fig. 4, and it is to be understood that the standards36 42 and supports 37 43, before referrcd to, are of exactly the samelorm, cxcept that the support 43 is not so much spread. The levers 23.24pass under the supports 37 62 and lie side by side and parallel toeachother, they being, however, fulcrumed at opposite ends and set at aslight inclination to their axes and to the body ol' the scale, so as toallow their free ends to underlie the extensionlevcrs 48 34, to whichthey are connected by shackles 52 53. rIhe lever 24 is suitably curvedor bent to pass over or, if preferred. under the end. of the cross-lever41, so that lsaid levers will not interl'ere with each other in theirvibrator-y movements. rllhe knife-edge pivots in the ends of the severalmounting-levers are preferably made adjustable by means ofextension-pieces, as 10, which are adj ustably secured to the ends ofthe several levers in any convenient manner, as indicated in Figs. land1*. By meansl of this adinstability these pivots may be brought intoproper position with relation to the pivots in the ends of theextension-levers without the necessity of changing the positions oitheir supports. rIhe extension-levers may be provided withlevelingpoints, as 16 17, upon which a suitable level or straight-edgecan be placed when it is dcsired to properly adj ust the various parts.

The operation of the apparatus is as follows: As the platform isdepressed by the weight of lthe load to be weighed, the levers 22, 23,24,

25, and 26 will be caused to rock slightly upon their pivots, and thuscarry their l'rcc ends downward. rlhis movement ol the levers 22 24will,through the shackles 35 53,1'oek the lever 34, which movement will,through the shackle 40, be communicated to the lever 41. The movementoi' the lever 26 will, through the shackle 39, lever 38, shackle 45,lever 44, and shackle 46, be communicated to the lever 48. rIhemovements of the levers 23 25 will, through shackles 52 8, be likewisecommunicated to the same lever, 48, which, through shackle 51, willtransmit the motion thus received from the several levers to the lever41, which will thus be caused to rock upon its pivot 12, and through thevertical rod 13 transmit the motion received from the severalmounting-levers to the scale-beam.

It will be readily seen that the herein-described system of levers mayby duplication be extended indefinitely, so as to accommodate a platformoi any desired length.

Vhat I claim is- 1. In a wcighingscale,the co1nbination,with the twomounting-levers 23 24, arranged side by side and fulcrumed at oppositeends, of the cross-lever 41, the extensio1'i-levers48 34, andconnections, substantially as described.

2. In a wei ghing-scale,the combination, with the two mounting-levers 2324, arranged side by side and lulerumed at opposite ends, and occupyingan inclined or oblique position with relation to the body ofthe scale,of the crosslevcr 41, the extension-levers 4S 34, and connections,substantially as described.

3. In a weighing-scale,the combination ,with the mounting-lever 24, ofthe cross-lever 41, the extension-lever 34, and connections, saidmounting lever being curved to pass said cross-lever, substantially asdescribed.

4. In a wei ghin g-scale,the combinatiomwith the two mounting-levers 2324, arranged side by side and fulerumed at opposite ends, ol' themounting-lever 25, the cross-lever 41, the extension-levers 34 48, andconnections whereby the vibrations ol' said mounting-levers aretransmitted to said cross-lever, substantially as described.

In a weighing-scale,the co1nbination,with the mounting-levers 25 26,arranged inline, of the cross-lever 41, the extension-levels 38, 44, and48, and connections whereby the vibrations of said mounting-levers aretransmitted to said cross-lever, substantially as described.

6. In a weighing-scale, the conibinatioinwith the two mounting-levers 2324, arranged side by side and fulcruined at opposite ends, ofthemounting-levers 25 26, arranged in line with cach other and with thelevers 23 24, the crosslever 41, the extension-levers 34, 48, 44, and38, and connections whereby the vibrations of said mounting-levers aretransmitted to said cross-lever, substantially as described.

7. The combination, with the levers 25 and 44, provided with singleknife-edge pivots, of the lever 48, provided with a triple knife-edgepivot, the yoke 7, and the shackles 1, 46, and 8, substantially asdescribed.

IDO

IIO

8. The Combination, with the extension-1e ing-levers are transmitted tosaid cross-lever, 1o vers 38 48, of the intermediate extension-lever,substantially as described. 44, and means for vertically adjusting saidIntestimonywhereof Ihave hereunto set my last-named lever, substantiallyas described. hand in the presence of two subscribing Wit- 5 9. Thecombination, with the mounting-lenesses.

vers 28 24C and the extension-levers 34 48 and l XVM. V. REYNOLDS. ycross-lever 4l, of the supports 37 62, formed \Vitnesses:

to bridge said mounting-levers, and eonnec- JOHN F. MERRILL, tionswhereby the vibrationsof said mountl GEO. A. MERRILL.

